please answer fast and give a detailed solution too.
Harsh Raj , 8 Years ago
Grade 11
Trigonometry> please answer fast and give a detailed so...
1 Answers
Ritesh Khatri
Using Identity Sinx = Cos(90-x) we can write
(cos20 – cos(90-20))/(cos20 + cos(90-20))
which is equal to
(cos20 – cos(70))/(cos20 + cos(70))
Now using transformation formula we get
[-2Sin45Sin(-25)]/[2cos45Cos25]
which gives Tan25
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